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Service Manual - Appliance Factory Parts

1. N N st Di Al i x EM LO LO oO T 7 LO T7 N O p o T ei Je e N E co 124 4 9 Lol 308 12 1 mm inch Ardschagegile Gas pipe connection 8 Liguidpipe connection Power amp transmission connection EE Earth screw a 18 Ceiling Cassette Air Conditioner Wiring Diagrams E Wiring Diagrams 1 Indoor Unit LCN240CP LC240CPI LCN340CP LC340CPI INDOOR WIRING DIAGRAM ZHO9 A809 0 c t doodaino Connector Number BLDC MOTOR CN MOTOR2 CN POWER FUSE 250V 3 15A RY D PUMP ROOM O O OUT PIPE THERMISTOR MICOM o mie REMOTE of Holo CONTROL CN VANE2 CN VANE1 CN DISP 3854A20993C Location CN POWER AC power supply CN MOTOR BLDC fan motor output CN DPUMP Drain pump output CN DISP Display CN FLOAT Float switch input CN REMO Remote control CN CC Dry contact CN ROOM Room sensor CN PIPE1 In pipe thermistor CN PIPE2 Out pipe thermistor CN GRILL Elevation grille CN PTC PTC Heater CN HVB HVB Ass y Air cleaner Service Manual 19 Wiring Diagrams 2 Outdoor Unit LCU240CP LC240CPO OUTDOOR WIRING DIAGRAM booo L CN_TEST CN_LEV1 MAIN PCB ASSY PIPE S DISCHARGE CIN FSI VEN ENEN ERES Mai
2. TWO TOT TOO TOT TOT OOS TOO lt gt J14 RY_ 5 H lt gt K d CLAY 5 lt gt J13 LEDO1T z co1a 4 TEEN ES N ICOB5M RO2A TOP ICOLA RDA Se ASM 6871A21318 4 F E PCB 6870A90716A 990018 CH Cu ARO J19J01 JO2 JO3 J04 JO5 Jos Q01 41 6 d cN_LEva COSM J18 S CN_CENTRAL Se CO3M J070 cd RXTXOUSU AAA Jl Com d CO4M COM CN_TH1 CN TH2 S CH EUG i T PIPE OUT pipE s T 17 T T CN LEU SINGLE C af w AH NS m Seto vom COIA Th CO Q r r e mescht TOAT CN OPTION 1 C E T CY4 GND1 T COZN 8 zoon 7 sume ml At S a Sd PCB 6870A901 51 J 1 LH eg e JL g ASM 6871A10362 B eum t Cw 6871410366 OE 6871A10231 6871A10363 10980 CN IWAY 52 Ceiling Cassette Air Conditioner Exploded View and Replacement Parts List E Exploded View and Replacement Parts List 1 Indoor Unit Model Ne ZA ELA bz EN w S EZAN EEN E Z MS SSN NSS RRS XS s
3. 552114 TUBE ASSEMBLY DISCHARGE OUTDOOR 5211A29916A 592117 552203 1 TUBE ASSEMBLY SUCTION OUTDOOR VALVE SERVICE 5211A29913A 5220A20007A 552203 2 VALVE SERVICE 5220A20006A 554031 554160 CONDENSER ASSEMBLY BENDING COMPRESSOR SET KOREA 5403A20022T 2520UGKK2AA GK120KAA 2EA 999010 FAN ASSEMBLY PROPELLER 1A00195B 561410 649950 SOLENOID CASE ASSEMBLY CONTROL OQUTDOOR 6141A20018Z 4995A10112M W6920 RELAY CONTACT 6920AP3400A WOCZZ 1 WOCZZ 2 CAPACITOR UNCLASSIFIED CAPACITOR FILM BOX 3A00988B 35uF 6120AR2194F 6 35UF W4810 BRACKET 3A01934B 268711 PCB ASSEMBLY MAIN 56 Ceiling Cassette Air Conditioner 6871A21318D J J ND D DID DDD D DD D DID DD D D DIDID D sss e DD D Exploded View and Replacement Parts List Y goo f NOAA N sees eee I yo C E UU 7 4 IN yy gt gg e E ME UP A Service Manual 57 Exploded View and Replacement Parts List Parts List Part No LOCATION N DESCRIPTION E LCU340CP LC340CPO 435301 GRILLE DISCHARGE 3530AP1225D 137213 PANEL ASSEMBLY SIDE 3721A20229A 430411 BASE ASSEMBLY WELD OUTDOOR 3041A20047Z 437211 PANEL ASSEMBLY FRONT OUTDOOR 3720AP 1212B 552117 TUBE ASSEMBLY SUCTION OUTDOOR 5211A00033A TUBE ASSEMBLY MENIFOLD OUTDOOR 552113 TUBE ASSEMBLY CONDENSER OUT AJR30109601 55220
4. space environment i Auto Restart Operation Whenever there is electricity failure to the unit and after resumption of the power unit will start in the same mode prior to the power failure Memorized condition are on off condition operating mode set temperature and fan speed The unit will memorize the above conditions and start with same memorized condition Two Thermistor Control There may be a significant difference between the temperature taken at the installed product and indoor tem perature Two thermistor control provides option to control temperature by referring any of the two tempera tures With the help of the slide switch at the back of the LCD wired remote controller selection of the desired thermistor for controlling the unit can be done One thermistor is in the Indoor unit amp the other one is in the LCD wired remote Service Manual 9 Features amp Benefits High Ceiling Operation According to the height of ceiling installation it pro vides variability of indoor fan motor rpm If the height of installation is low then you can adjust low rpm of indoor fan motor On the other hand if the height of the installation is high you can adjust high rpm of indoor fan motor Selection of speed can be done by slide switch at the back of the LCD wired remote ex Selection Height RPM Lower 2 4m 7 9ft 700 600 500 Standard 2 7m 8 9ft 750 650 550 Higher 3 0m 9 8ft 800 700 600 Wate
5. 5421A10062A 359012 FAN TURBO 5900A10016A Viv NIN D D DD DID D DID DIDID D DID DD D D 552111 TUBE ASSEMBLY CAPILLARY 5211A10550B W49800 SUPPORTER ASSEMBLY 4981A21011A 54 Ceiling Cassette Air Conditioner JJ Exploded View and Replacement Parts List 2 OUTDOOR UNITS gt TE Ad E SA Zeen WIM WEE ON CAL LLL AL LS Service Manual 55 Exploded View and Replacement Parts List Parts List LOCATION No DESCRIPTION Part No LCU240CP LC240CPO 137213 1 PANEL ASSEMBLY SIDE 1A00202F 137213 2 567480 1 PANEL ASSEMBLY SIDE THERMISTOR NTC 3A02284N 6323A20028B 567480 2 THERMISTOR NTC 6323A20023E 349480 349600 ORIFICE BRACKET MOTOR 4948AP2527A 1A00206B 430410 BASE ASSEMBLY OUTDOOR 3041AP2741G 435300 435301 GRILLE REAR GRILLE DISCHARGE 1A00208H 3530A20007J 435511 COVER ASSEMBLY CONTROL OUTDOOR 3550AR2886C 435512 437210 COVER ASSEMBLY TOP OUTDOOR PANEL ASSEMBLY FRONT SUB 3H03266H 1A00197C 447910 BARRIER ASSEMBLY OUTDOOR 4791A30004H 546810 W49810 MOTOR ASSEMBLY SUPPORTER ASSEMBLY 4681A10030C 4980A20001B 990140 DAMPER COMPRESSOR 4H00982E 552112 552113 TUBE ASSEMBLY CONDENSER IN TUBE ASSEMBLY CONDENSER OUT 5211A25715A 5211A25716A
6. 19 21 23 CHILD LOCK Display List of Functions P List of Functions e Ceiling Cassette Category Function AT C243HLFO AT C343HLFO Air flow Air purifying Installation Reliability Convenience Individual Control CAC Network Function Special Function Kit Others Note Air supply outlet Airflow direction control left amp right Airflow direction control up amp down Auto swing left amp right Auto swing up amp down Airflow steps Fan Cool Heat CHAOS swing CHAOS wind Auto wind Jet cool Power wind Swirl wind Deodorizing filter Plasma air purifier Prefilter Washable Drain pump E S P control Electric heater Operation High ceiling operation Hot start Self diagnosis Soft dry operation Auto changeover Auto cleaning Auto operation Artificial intelligence Auto restart operation Child lock Forced operation Group control Sleep mode Timer On Off Timer weekly Two thermistor control Standard wired remote controller Deluxe wired remote controller Simple wired remote controller Wired remote controller for hotel use Wireless remote controller simple Wireless LCD remote controller General central control Non LGAP Dry contact Simple central control LGAP PDI Power Distribution Indicator PI 485 CTIE Zone control Thermistor O Applied X Not applied No relation Option Model name amp price are different ac
7. Indoor unit type Ceilling Cassette 4way Model AT C243HLFO AT C343HLFO LCN240CP LC240CPI LCN340CP LC340CPI Power supply Phase Volts Hz 1 208 230 60 1 208 230 60 Cooling capacity kW 7 03 9 96 Btu h 24 000 34 000 Heating capacity kW Btu h Current Nominal running current A 1 0 1 0 Fan Motor Type BLDC BLDC Fan Type Turbo Fan Turbo Fan Motor Output W number of units 50 6 1 50 6 1 Air flow rate H M L cmm 18 4 17 0 15 6 24 1 22 7 21 2 cfm 650 600 550 850 800 750 Capacitor mF V Drive DC DC Coil Row stages FPI mm 2H 9C 18 2H 9C 18 Dimensions Body mm inch 840 840 225 33 16 331 16 87 8 840 840 225 331 16 331 16 87 8 W D H Decorative Panel mm inch 950 950 30 3719 32 3713 32 13 16 950 950 30 3713 a2 3713 32 13 16 Net Weight Body kg lbs 26 57 3 26 57 3 Decorative Panel kg lbs 3 6 61 3 6 61 Gross Weight Body kg lbs 30 66 30 66 Decorative Panel kg lbs 4 9 4 9 Air filter Long Life filter Long Life filter Sound Level H M L dB A 3 38 35 32 40 37 34 Piping Connections Liquid mm inch 6 35 1 4 6 35 1 4 Gas mm inch 12 7 1 2 15 88 5 8 Drain OD ID mm inch 32 25 1 26 0 98 32 25 1 26 0 98 Dehumidification rate I h pts h 3 0 6 3 3 7 7 8 Safety Devices Fuse Thermal protector for Fan motor Temperature sensor Thermistor Thermistor Refrigerant R410A R410A Refrigerant control EEV EEV Connectable outdoor Unit Single Single Power and Transmission inter
8. 840 33 1 e G r 688 27 1 l F H 5 eo 8 amp 2 8 Cn tH CO e Bl E amp X po X j rn 840 33 1 ed 3 mm inch No Part Name Remark 1 Decoration panel 2 Air suction grille 3 Air discharge grille 4 Gas pipe connection 5 Liquid pipe connection 6 Drain pipe connection 7 Power supply connection 16 Ceiling Cassette Air Conditioner Dimensional Drawings 2 Outdoor Units Model No LCU240CP LC240CPO _ 870 34 3 546 21 5 160 6 3 T T e Po ois GN ex 5 S c D Gd fi Ee O m e 54 6 2 1 320 12 6 y 3 a N 808 31 8 782 5 30 8 392 15 4 d Jj 80 3 1 50 2 0 j e DIN 5 ql mm inch No Part Name Remark 1 Air discharge grille 2 Gas pipe connection 3 Liquid pipe connection 4 Power amp transmission connection 9 Earth screw Service Manual 17 Dimensional Drawings Model No LCU340CP LC340CPO 900 35 4 550 21 7 370 14 6
9. Connect the power supply cord to the independent power supply e Circuit breaker is required 2 Operate the unit for fifteen minutes or more 3 Evaluation of the performance 1 Measure the temperature of the intake and dis charge air 2 Ensure the difference between the intake tempera ture and the discharge one is more than 8 C 14 4 F Thermometer CAUTION After the confirmation of the above conditions prepare the wiring as follows 1 Never fail to have an individual power specialized for the air conditioner As for the method of wiring be guided by the circuit diagram pasted on the inside of control box cover 2 Provide a circuit breaker switch between power source and the unit 3 The screw which fasten the wiring in the casing of electrical fittings are liable to come loose from vibrations to which the unit is subjected during the course of transportation Check them and make sure that they are all tightly fastened If they are loose it could give rise to burn out of the wires 4 Specification of power source 5 Confirm that electrical capacity is sufficient 6 Be sure that the starting voltage is maintained at more than 90 percent of the rated voltage marked on the name plate 7 Confirm that the cable thickness is as specified in the power sources specification Particularly note the relation between cable length and thickness 8 Never fail to equip a leakage breaker where it is wet or moist 9 The following
10. cient wait approximately 1 minute and then repeat the procedure pumping down pin 3 way Valve Outdoor unit 4 Immediately disconnect the charge hose from the gas side valve s service port This is different from previous procedures Because you are charging with liquid refrigerant from the gas side absolutely do not attempt to charge with larger amounts of liquid refrigerant while operating the air conditioner Stopping partway will allow the gas to be dis charged If the system has been charged with liquid refrigerant while operating the air conditioner turn off the air conditioner before disconnecting the hose 5 Mount the valve stem nuts and the service port nut Use torque wrench to tighten the service port nut to a torque of 1 8 kg m 4 2kg m 5 5kg m Be sure to check for gas leakage Service Manual 51 Outdoor Indoor Electronic Control Device E Electronic Control Device e Main P C B ASM COMP C4WAY_S pi
11. hose of the manifold gauge Connect the service port of the gas side valve to the low side of the gauge 4 Evacuation for approximately one hour Confirm that the gauge needle has moved toward 76 cmHg vacuum of 4 mmHg or less Go 5 Close the Low handle of the gauge turn off the vacuum pump and confirm that the gauge nee dle does not move approximately 5 minutes after turning off the vacuum pump 50 Ceiling Cassette Air Conditioner 3 Gas Charging After Evacuation EEN Gas side NE Check valve Charging cylinder 2 O Lo 1 open WW e Procedure 1 Connect the gauge to the charging cylinder Connect the charge hose which you disconnect ed from the vacuum pump to the valve at the bottom of the cylinder If you are using a gas cylinder also use a scale and reverse the cylinder so that the system can be charged with liquid 2 Purge the air from the charge hose Open the valve at the bottom of the cylinder and press the check valve on the charge set to purge the air Be careful of the liquid refrigerant The procedure is the same if using a gas cylinder 3 Open the low handle on the gauge and charge the system with liquid refrigerant If the system can not be charged with the speci fied amount of refrigerant it can be charged with a little at a time approximately 150g 5 3oz each time while operating the air conditioner in the cooling cycle however one time is not suffi
12. objects through outdoor units the air inlet or outlet while the product is oper ated here is risk of personal injury and failure of product e There are sharp and moving parts that could cause personal injury Service Manual 7 Features amp Benefits a Features amp Benefits Environment Friendly Refrigerant LG Ceiling Cassette Air Conditioners uses environ ment friendly refrigerant which don t do any harm to the environment Plasma Air Purifier It removes not only microscopic contaminants A dust but also house mites pollen and pet fur to help preventing allergic diseases like asthma lt provides odor free dust free and allergy free air Group Control It enables to control as much as 16 units with the help of one wired remote controller All the units will follow same setting of temperature amp other sub func tions Central Control It enables to control 16 x 8 128 units with the help of 8 controllers All units can be put on and off from one Central Room For Setting Temperature Fan Speed and other sub functions access the respec tive LCD wired remote controller of each unit Jet Cool In this mode quick and fast cooling is done Cold and high velocity air is supplied to the room till the indoor temperature reaches 18 C 64 F The unit will contin ue to run in jet cool mode till the Indoor temperature reaches 18 C 64 F 8 Ceiling Cassette Air C
13. troubles would be caused by voltage drop down e Vibration of a magnetic switch damage on the contact point there of fuse breaking disturbance to the nor mal function of a overload protection device e Proper starting power is not given to the compressor HAND OVER Teach the customer the operation and maintenance procedures using the operation manual air filter cleaning temperature control etc Service Manual 29 Installation 9 Optional Operation 1 Two Thermistor System 1 Open the rear cover of the wired remote controller to set the mode 2 Select one of three selectable modes as follows Position 1 The room themperature is controlled by the thermistor of the wired remote controller control the temperature according to the position of wired remote controller e Position 2 The room temperature is controlled by the thermistor of the main body and of remote controller sensor e Position 3 The room temperature is controlled by lower temperature between the temperature of main body 3 Move the slide switch to set position Slide switch for 2 Thermistor AL E IS A b i 2e 1 TES 1e 2 3 I 4 Close the rear cover and check if it works normally CAUTION e Select the position after counselling with a customer In case of cooling mode room temperature is controlled by the main body sensor the temperature more accurately To control the room temperature by a wired r
14. 3 1 VALVE SERVICE 5220A20013A 554160 1 COMPRESSOR SET KOREA TBZ30130501 GJ208KAA 561410 SOLENOID 61414200182 WOCZZ 1 CAPACITOR FILM BOX 6120AR2194F 6 35uF JJ JJ J J JJ J J JJ J J JJ J J JJ J J JJ J I JJ J J JJ J J JJ J D D 0 58 Ceiling Cassette Air Conditioner Exploded View and Replacement Parts List Service Manual 59 Exploded View and Replacement Parts List Parts List Part No ee DESCRIPTION 7 PT CDC1 137211 PANEL ASSEMBLY FRONT INDOOR 3 21A10106M 159830 FILTER ASSY AIR CLEANER 5231A10004A 60 Ceiling Cassette Air Conditioner P No 3828A20911A Printed in Korea
15. C Peak IPM Fault CT2 Max CT MPS Variable MPS Inverter 5 times Q 6 times LED2 Green LED 1 Red 2 times Q 2 times Q Indoor Status ON OFF 23 24 DC Link Low Volt 2 times qg 3 times 2 times 2 times 9 OFF OFF 25 26 High Low Pressure Heatsink Switch e Low Voltage Over Voltage e DC COMP Position Error 4 times O 5 times Q 2 times Q 2 times OFF OFF 27 28 PSC Fault Error DC Link High Volt 6 times Q 7 times Q 8 times Q 2 times Q 2 times OFF OFF 32 33 D Pipe High INV D Pipe High Normal 3 times 3 times 2 times 9 OFF OFF 40 41 44 CT Sensor open short INV D Pipe Thermistor Error Open Short Outdoor Air Thermistor Error Open Short 4 times Jo 4 times 4 times OFF OFF OFF 45 46 Cond Pipe Thermistor Error Open Short Suction Pipe Thermistor Error Open Short 4 times 4 times A 4 times 5 times 9 OFF OFF 47 51 Const D Pipe Thermistor Error Open Short Capcity Error High Low 6 times 7 times 4 times 9 5 times Q OFF OFF 54 Signal Error Indoor_Outdoor Phase Error 1 times 3 times 5 times 5 times OFF OFF 60 61 EEPROM Check Sum Error 6 times 6 times OFF OFF 62 63 Cond Pipe High Heatsink High Cond Pipe Low 1 times 9 2 times 3 times 9 6 times Q 6 times OFF OFF 65 Heats
16. Connector e Check the soldering condition on PWB of CN U D Connector Check the operating circuit of the Vertical Louver e Confirm that there is DC 12V between pin RED of CN U D and GND If there are no problems after above checks e Confirm the assembly conditions that are catching and interfering parts in the rotation radial of the Vertical Louver Service Manual 37 Troubleshooting Guide Self diagnosis B Error Indicator e The function is to self diagnoisis airconditioner and express the troubles identifically if there is any trouble e Error mark is ON OFF for the operation LED of evaporator body in the same manner as the following table e f more than two troubles occur simultaneously primarily the highest trouble fo error code is expressed e After error occurrence if error is released error LED is also released simultaneously To operate again on the occurrence of error code be sure to turn off the power and then turn on e Having or not of error code is different from Model MPS LED 1 LED2 Inverter Red Green Indoor Error MPS Variable Indoor Error code Status Description No Error Indoor Room Thermistor Error 1 time ON OFF Indoor In Piping Error 2 times Q OFF Remote controller Error 3 times 9 4 times Q OFF Drain Pump Error Communication Error between In and Out e Indoor Out Piping Error Outdoor Error Error Code 21 22 Description D
17. EV EEV Heat Exchanger Rows Column FPI 2H 36C 20 2H 52C 18 Defrosting method Fan Capacitor mF Vac 6 370 Drive Direct Drive Direct Drive Discharge Direction oide Top Side discharge Side discharge Air flow rate cmm cfm 51 1801 105 3708 Noise level H Sound press 1m db A 3 55 58 Piping connections Liquid mm inch 6 35 1 4 6 35 1 4 Gas mm inch 12 7 1 2 15 88 5 8 Max piping length m ft 30 100 35 115 Max elevation Indoor unit Outdoor unit m ft 15 50 20 66 igi ies are based on the following conditions Conversion Formula Cooling Indoor Temperature 26 7 C 80 F DB 19 4 C 66 9 F WB kW Btu h x 0 0002931 Outdoor Temperature 35 C 95 F DB 23 9 C 75 F WB CFM CMM x 35 3 Piping Length Interconnecting Piping Length 7 5m 25ft Level Difference of Zero Service Manual 15 Dimensional Drawings E Dimensional Drawings 1 Indoor Units Model No LCN240CP LC240CPI LCN340CP LC340CPI 900 35 4 ceiling opening 840 33 1 I 688 27 1 hanging bolt T EE t in 950 37 4 EER M 88 2 8 IR s Bd IS B 8 o _ 950 37 4 _ L4 I Ne ee ZO I Ce N
18. bnormal Heat sink sensor Service Manual 45 Troubleshooting Guide Troubleshooting CH51 C pid Cause of error Check point amp Normal condition Over Capacity Capacity Error Combination e Undder Capacity Combination e Check the indoor unit capacity e Check the combination table EEPROM e Check the PCB ASM P No Check sum SENS e Check the poor soldering Check Point e CH 51 e CH 60 1 Check the indoor unit capacity 1 Check the insertion condition of EEPROM 2 Check the poor soldering 46 Ceiling Cassette Air Conditioner Troubleshooting Guide Troubleshooting CH61 Ci pela Cause of error Check point amp Normal condition Condenser e Condenser pipe sensor pipe sensor detected high temp high temp 65 C 149 F e Check the load condition e Check the sensor of Condenser pipe sensor e Heat sink sensor detected high temp 85 C 185 F Heat sink sensor temp high e Check the fan is locked e Check the sensor of heat sink Heat Sink temp Toff C COMP Frequency a Hz a Hz Check Point e CH 61 e CH 62 1 Check the install condition for over load 1 Check the fan is locked Refrigerant Pipe length Blocked 2 Check the Outdoor temp is very high Service Manual 47 3 way Valve E 3 way Valve emee samen Open position Closed position Open position Closed position To piping T DPI connection Service Service connection ae Servi po
19. cording to options and assembled in factory with main unit 4 X Auto Co OJ OI O O PXx XxOO xIO O O O OO 5 O Xx Option O 0 O O PQWRHSFO Option Option Option Option Option X X 4 X Auto Co OJ OI O O PXx xOO xIO O O O O O x x 5 O Xx Option O OO OO O PQWRHSFO Option Option Option Option Option X X Accessory Installed at field ordered and purchased separately by the corresponding model name supplied with separate package Service Manual 11 Function of Remote Control a Function of Remote Control 1 Wireless LCD Remote Control START STOP BUTTON D Operation starts when this button is pressed and CS stops when the button is pressed again mE Ess transmitter 2 OPERATION MODE SELECTION BUTTON SA Used to select the operation mode CO 3 ROOM TEMPERATURE SETTING BUTTONS Used to select the room temperature 4 INDOOR FAN SPEED SELECTOR Used to select fan speed in four steps S low medium and high ps JET COOL EN EEEN Used to start or stop the speed cooling speed cooling operates super high fan speed in cooling mode CS AUTO SWING BUTTON 1 Used to stop or start louver movement and set the As desired up down airflow direction c 7 ON OFF TIMER BUTTONS 3 Used to set the time of starting and stopping opera tion 8 TIME SETTING BUTTONS 10 Used to adjust the time 9 9 TIMER SET CANCEL BUTTON 12 Used to set the time
20. does not operate owing to the delaying function for 3 minutes after stopped When the compressor stopped Indoor Fan is driven by a low speed At this point the wind speed is not controlled by the remote controller When operated in the Sleeping Mode the wind speed is set to the low speed as force Caused by the remote controller Caused by other parts except the remote controller When the mark A is displayed in LCD Check the contact of CN DISP 1 connector screen replace battery UE When the detect switch double key inside the Check DISP PWB Ass y remote controller door is fault it is impossible to Voltage between CN DC 5V operate temperature regulating A W and wind speed selecting Check the Display PWB Ass y e Check receiver ass y 34 Ceiling Cassette Air Conditioner Troubleshooting Guide Trouble 3 When cooling does not operate Turn on Main Power Operate Cooling Mode 3 amp by setting the desired temperature of the remote controller is less than one of the indoor temperature by 1 C at least When in Air Circulation Mode Compressor Outdoor Fan is stopped Check the sensor for indoor temperature is attached as close as to be effected by the temperature of Heat Exchanger EVA d When the sensor circuit for indoor temperature and connector are in bad connection or are not engaged Compressor Outdoor Fan is stopped e Check the indoor temperature sensor is disconnected
21. e air conditioner 3 Feed the power source to the unit via a distribution switch board designed for this purpose 4 The terminal screws inside the control box may be loose due to vibration during transport Check the screws for loose connection Running the air conditioner with loose connection can overload and damage electrical components 5 Always ground the air conditioner with a grounding wire and connector to meet the LOCAL REGULATION I 24k 34k Btu h 19 e Cooling amp Heating type POWER INPUT AX CAUTION The power cord connected to the outdoor unit should be The connecting cable connected to the indoor and outdoor complied with the following specifications Rubber unit should be complied with the following specifications insulation type HOSRN F approved by HAR or SAA Rubber insulation type HOSRN F approved by HAR or SAA Z NORMAL CROSS SECTIONAL AREA P Capacity 1 Phase NORMAL 24k Btu h 2 1mm AWG 14 CROSS SECTIONAL 34k Btuh 3 3mm AWG 12 G AREA 2 1mm AWG 14 24k 34k O Me m Zn c 7 If the supply cord is damaged it must be replaced by a special cord or assembly available from the manufacturer of its service agent VAN WARNING Make sure that the screws of the terminal are free from looseness 24 Ceiling Cassette Air Conditioner Installation 5 Installation of Decoration Panel The decoration panel has its installation Before installing the decoration panel di
22. emote controller install controller room temp sensor to sense e Maunfactured in the position 3 30 Ceiling Cassette Air Conditioner Installation 2 Adjusting air volume to the height of ceiling You can choose the RPM or air volume of indoor motor according to the height of ceiling to supply the com fortable atmosphere to consumers Procedure 1 Choose the selectable position in the table after measuring the height of ceiling Ceiling height Mode of slide switch Change of air volume more than 3 3m 10 8ft High Ceiling Increasing 2 7 3 3m 8 9 10 8it Standard less than 2 7m 8 9ft Low Ceiling Decreasing Maunfactured in stan dard mode 2 In the case of changing the height as high or low open the rear cover of the wired remote controller 3 Move the slide switch to the set position 4 Close the rear cover and check if it works nomally Slide switch for ceiling height 3 Group Control It operates maximum 16 Units by only one Wired Remote Controller and each Unit starts sequentially to prevent overcurrent Wiring design Main PCB Indoor Unit 1 MMoorUnt2 1 deorUnit i6 Terminal Local Supply Terminal Local Supply Terminal Local Supply g Ge Connector PIDEN Connector EES Connector Ld REDAN r S E md Main PCB BR GND 1 ODA r exon il 82 tr n Connecting Cable Local Suppl
23. eshooting Guide Troubleshooting CH03 Display Rede Title Cause of error Check point amp Normal condition 03 Communication e Open Short Wired R C e Wrong connection Wired R C 12V S GND e Connection of wire e Main PCB Volt DC12V e Noise interference Indoor Unit 12V S GND Check the Volt Check Point Check the Volt 1 Check the wire connection Open Short Repair the connection 2 Check the soldering state of connector Soldered poorly Repair or Change the PCB 3 Check the volt Of main PCB power source DC 12V DC 5V Repair or Change the main PCB 4 Check the installation of wired remote controller Noise interference Adjust the state of installation 40 Ceiling Cassette Air Conditioner Troubleshooting Guide Troubleshooting CHO4 Ge Cause of error Check point amp Normal condition e The connection of wire Drain pump Float switch Drain pump e Float switch Open e Drain pump power input 220V Float switch Normal short Drain tube installation e Indoor unit installation Inclination CN Float Check the resistance Check Point 1 Check the wire connection Open Soldered poorly Repair the connection or change the PCB 2 Check the resistance of float switch Abnormal Open Normal short Check the float switch 3 Check the level of water 4 Check the volt Of Drain pump power supply AC 230V Repair or Change
24. ink Thermistor Error Open Short 38 Ceiling Cassette Air Conditioner 6 times 9 5 times 9 OFF Troubleshooting Guide Troubleshooting CHO1 pd i Cause of error Check point amp Normal condition e Open Short Indoor air sensor Soldered poorly Normal resistor 10KQ at 25 C 77 F Unplugged e Internal circuit error Normal voltage 2 5Vdc at 25 C 77 F plugged e Open Short Indoor inlet pipe sensor Soldered poorly e Internal circuit error Normal resistor 5KQ at 25 C 77 F Unplugged Normal voltage 2 5Vdc at 25 C 77 F plugged e Open Short Indoor outlet pipe sensor Soldered poorly e Internal circuit error Normal resistor 5KQ at 25 C 77 F Unplugged Normal voltage 2 5Vdc at 25 C 77 F plugged Check the resistance Check the voltage Point 1 Unplug the sensor on Indoor unit PCB Estimate the resistance of each sensor If the resistance of the sensor is 10KQ 5KQ at 25 C 77 F then sensor is normal If the resistance of the sensor is O KQ or ee then sensor is abnormal Change the sensor Plug the sensor on Indoor unit PCB and Power ON Estimate the voltage of each sensor If the voltage of the sensor is 2 5Vdc at 25 C 77 F then sensor is normal COON OO A C N If the resistance of the sensor is O or 5Vdc then sensor is abnormal Repair or Change the PCB Service Manual 39 Troubl
25. n Power TO INDOOR UNIT EBY31026501 Notes BL BLUE BLACK BROWN RD 858091 398 7 084GB 5 43 WHITE YL YELLOW GN YL GREEN YELLOW j FIELD WIRING LCU340CP LC340CPO OUTDOOR WIRING DIAGRAM MAIN PCB ASSY 5 RY COMP B 5 RY COMP A E ad RBL LIE Main Power TO INDOOR UNIT EBY31026502 Notes BL BR BROWN RD RED OR ORANGE WHITE YL YELLOW GN YL GREEN YELLOW FIELD WIRING 20 Ceiling Cassette Air Conditioner Refrigerant Cycle Diagrams E Refrigerant Cycle Diagrams 1 Cooling Only Models INDOOR UNIT OUTDOOR UNIT Thermistor Check i Thermistor Air Heat l Exchanger I Capillary Tube 8 Accumulator Constant Compressor 1 Constant Compressor 2 Pipe Size Diameter O inch Piping length ft Elevation ft Additional Capacity Refrigerant oz ft 24k Service Manual 21 Installation a Installation 1 Select the best location Install the air conditioner in the location that satisfies the following conditions 1 1 Indoor Unit e There should not be any heat source or steam near the unit e There should not be any obstacle to the air circulation A place where air circulation in the room will be good A place where drainage can be easily obtained Ceiling A place where noise prevention is taken into considera Ceiling Board tion e Do not install the unit near the door way Ensure the
26. n the breaker off or discon nect the power supply cable There is risk of fire or failure of product here is risk of electric shock or fire Do not open the inlet grill of the product during Be cautious that water could not enter the operation Do not touch the electrostatic filter product if the unit is so equipped e There is risk of physical injury electric shock or prod There is risk of fire electric shock or product damage uct failure N Da S ad KX A IO b ES Fa N TON os A CAUTION B installation Always check for gas refrigerant leakage after Install the drain hose to ensure that water is installation or repair of product drained away properly Low refrigerant levels may cause failure of product e A bad connection may cause water leakage 6 Ceiling Cassette Air Conditioner Safety Presautions Keep level even when installing the product Use two or more people to lift and transport the product e To avoid vibration or water leakage Avoid personal injury B Operational Use a soft cloth to clean Do not use harsh Do not touch the metal parts of the product detergents solvents etc when removing the air filter They are very sharp here is risk of fire electric shock or damage to the There is risk of personal injury plastic parts of the product Do not step on or put anyting on the product Do not insert hands or other
27. nel Decoration Fit the insulator this part and panel be careful for cool air leakage Service Manual 25 Installation 6 Heat Insulation and pipings HEAT INSULATION 1 Use the heat insulation material for the refrigerant piping which has an excellent heat resistance over 120 C 248 F Fastening band 2 Precautions in high humidity circumstance accessory This air conditioner has been tested according to the KS Standard Conditions with Mist and con here is not any default However if it is operated for a long time in high humid atmosphere dew point temperature more than 23 C 73 4 F water drops are liable to al In this case ace heat insulation EN material according to the following procedure accessory Refrigerant piping Indoor unit e Heat insulation material to be prepared Adiabatic glass wool with thickness 10 to 20mm 0 39 to 0 79inch e Stick glass wool on all air conditioners that are located in ceiling atmosphere e n addition to the normal heat insulation thickness more than 8mm 0 31inch for refrigerant piping gas piping thick piping and drain piping add further 10mm to 30mm 0 39inch to 1 18 inch thickness material FORM THE PIPINGS 1 Wrap the connecting portion of indoor unit with the Insulation material and secure it with two Figli ee E Plastic Bands for the right pipings with gum type sealer f you want to connect an additional drain hose the end of the drain outle
28. ng CH41 CH4 pd Cause of error Check point amp Normal condition D pipe sensor Inverter oninia Normal resistor 200KQ at 25 C 77 F Unplugged sIntermal cireilt error Normal voltage 4 5Vdc at 25 C 77 F plugged e Open Short Air sensor e Soldered poorly e Internal circuit error Normal resistor 10KQ at 25 C 77 F Unplugged Normal voltage 2 5Vdc at 25 C 77 F plugged e Open Short Condenser Pipe sensor Soldered poorly e Internal circuit error Normal resistor 5KQ at 25 C 77 F Unplugged Normal voltage 2 5Vdc at 25 C 77 F plugged Open Short Soldered poorly Normal resistor 5KQ at 25 C 77 F Unplugged Suction Pipe sensor p e Internal circuit error Normal voltage 2 5Vdc at 25 C 77 F plugged e N resi 200KQ at 25 C 77 F Unpl d D pipe sensor Constant Soldered poorly e Normal resistor Q at 25 C 77 nplugge PIP l e Internal circuit error Normal voltage 4 5Vdc at 25 C 77 F plugged e Open Short e Soldered poorly Normal resistor 10KQ at 25 C 77 F Unplugged e Internal circuit error Normal voltage 2 5Vdc at 25 C 77 F plugged Check Point 1 Estimate the resistance of each sensor Unplugged 2 Estimate the voltage of each sensor Plugged 3 If the resistance of the sensor is O KQ or then sensor is abnormal Q If the voltage of the sensor is O V or 5Vdc then sensor is a
29. oltage 140Vac 300Vac 1 Check the components Check Point e CH 24 e CH 25 1 Check the connection of CN PRESS 1 Check the power source 2 Check the install condition for over load 2 Check the components 3 Check the SVC V V open Trans1 B Diode Diode Resistance 4 Check the leakage of refrigerant Service Manual 43 Troubleshooting Guide Troubleshooting CH Display code D pipe Inverter temp high 105 C 221 F f e Discharge sensor D pipe Constant temp high 105 C 221 F 1 e Discharge sensor LEV OPEN Hz down LEV OPEN Hz down NORMAL Inverter Check Point e CH 32 1 Check the install condition for over load 2 Check the SVC V V open 3 Check the leakage of refrigerant 44 Ceiling Cassette Air Conditioner Inverter temp high Cons temp high Cause of error Check point amp Normal condition e Check the discharge pipe sensor for INV e Check the install condition for over load Check the leakage of refrigerant e Check the SVC V V open e Check the discharge pipe sensor for Cons e Check the install condition for over load e Check the leakage of refrigerant e Check the SVC V V open LEV OPEN LEV OPEN NORMAL Constant e CH 33 1 Check the install condition for over load 2 Check the SVC V V open 3 Check the leakage of refrigerant 4 Check the constant compressor Same with CH21 Troubleshooting Guide Troubleshooti
30. on conditions 2 On Off Button Operation starts when this button is pressed and stops when the button is pressed again 3 Set Temperature Button Used to set the temperature when the desired tem perature is obtained 4 FAN Operation Button Used to circulate room air without cooling D Fan Speed amp Jet Cool Button Used to set the desired fan speed and select jet cool mode 6 Operation Mode Selection Button Used to select the operation mode e Auto Operation Mode e Cooling Operation Mode e Soft Dry Operation Mode Auto Swing Button Used to swing up and down 8 Room Temperature Checking Button Used to check the room temperature 9 Plasma Air Clean Button Used to start or stop the plasma purification function 10 Timer Cancel Button Used to cancel the timer 11 Timer Set Button Used to set the timer when the desired time is obtained 12 Week Button Used to set a day of the week 13 Program Button Used to set the weekly timer 14 Holiday Button Used to set a holiday of the week 15 Time Set Button Used to set the time of the day and change the time in the weekly timer Function 16 Set and Clear Button Used to set and clear the weekly timer 17 Swirl Button Used to select swirl swing mode 18 Reset Button Used to set the current time and clear the setting time Service Manual 13 Specifications E Specifications
31. onditioner electrode Dust particles i discharge Pre filter lonizer Dusts Collection d SE EK RE S 1e 6 5KV CE VR EE Poll m discharge c K Purifi Air m d NN fresh e E 6 Generating Odour plasma dusts aluminum coated Odor molecule electrode 3 25KV Adcharge Controller 1 2 8 Features amp Benefits Swirl Swing I j i i i Comparison of Floor It is the function for comfort cooling heating operation emer j SS 100 improved e 4 8 2 4 4 Open Conventional Swirl Swing New The diagonal two louvers are opened the more larger than the other louvers After one minute it is opposite p Comparison of Air Flow Types 4 Open Conventional Swirl Swing New Vane 2 Vane 1 Close Open Close Vane 3 Vane 4 Space Control Vanes angle can be controlled by pair considering its installation environment I For example direct drafts can be annoying leading to discomfort and reduced productivity vane control deg 4 helps to eliminate this problem 9 i 4 v kS Easily controlled by wired remote control E w Te Air Flow can be controlled easily regarding any
32. op operation and wait for 3 minutes then con nect the manifold gauge to the service port of the gas side valve Connect the hose of the gauge with the push pin to the service port 4 Air purging of the charge hose Open the Low handle valve on the gauge slightly to air purge from the hose 5 Set the liquid side valve to the closed position 3 way Valve Outdoor unit 6 Operate the air conditioner at the cooling cycle and stop it when the gauge indicates 1kg cm g 7 Immediately set the gas side valve to the closed position Do this quickly so that the gauge ends up indi cating 1kg cmg Go Disconnect the charge set and mount the liquid side and gas side valve caps and the service port nut Use torque wrench to tighten the service port nut to a torque of 1 8kg m 4 2kg m 5 5kg m Be sure to check for gas leakage Be sure to short pressure S W otherwise Low pressure S W detect low pressure skete and stops the compressor Service Manual 49 3 way Valve 2 Evacuation All amount of refrigerant leaked Liquid side 777 Outdoor unit 2 e Procedure 1 Confirm that both the liguid side valve and gas 6 Disconnect the charge hose from the vacuum side valve are set to the opened position pump Vacuum pump oil If the vacuum pump oil becomes dirty or deplet ed replenish as needed 7 Mount the valve caps and the service port caps eg Connect the vaccum pump to the center
33. or Outdoor Indoor Outdoor AT C243HLFO LCN240CP LCU240CP LC240CPI LC240CPO AT C343HLFO LCN340CP LCU340CP LC340CPI LC340CPO Service Manual 3 Safety Presautions I Safety Precautions To prevent injury to the user or other people and property damage the following instructions must be followed B Incorrect operation due to ignoring instruction will cause harm or damage The seriousness is Classified by the following indications WARNING This symbol indicates the possibility of death or serious injury AX CAUTION This symbol indicates the possibility of injury or damage to properties only B Meanings of symbols used in this manual are as shown below Be sure not to do Be sure to follow the instruction AWARNING B installation Do not use a defective or under Always ground the product Install the panel and the cover rated circuit breaker Use this of control box securely appliance on a dedicated circuit e here is risk of fire or electric e here is risk of fire or electric e There is risk of fire or electric shock shock shock Always install a dedicated cir Use the correctly rated break Do not modify or extend the cuit and breaker er or fuse power cable e Improper wiring or installation may e There is risk of fire or electric here is risk of fire or electric cause fire or electric shock shock shock 4 Ceiling Cassette Air Conditioner Safety Presautions Do not install remove o
34. or not About 10kQ at 25 C 77 F Check Relay RY COMP for driving compressor e When the power About AC208V 230V is applied to the connecting wire terminal support transferred to compressor PWB Ass y is normal e Check the circuit related to the relay Check point COMP ON COMP OFF Between two pin of DC Below DC 1V part in relay for COMP app About DC12V Service Manual 35 Troubleshooting Guide Jige e e When indoor Fan does not operate Turn off Main power Check the connection of CN FAN or CN MOTOR Check the Fan Motor Hi Check the Fuse AC250V T2A V Check the related circuit of indoor Fan Motor e The pin of Micom and the part for driving SSR e Check the pattern e Check the SSR SSR Open Indoor Fan Motor never operate SSR short Indoor Fan Motor always operates in case of ON or OFF Turn ON Main Power i Check the SSR high speed operation by remote control The Indoor Fan Motor is connected The voltage of PIN NO 1 blue and 3 yellow of CN FAN or CN MOTOR AUN About AC 160V over About AC 50V over MS SSH is not damaged 36 Ceiling Cassette Air Conditioner Troubleshooting Guide iid When Vertical Louver does not operate e Confirm that the Vertical Louver is normally geared with the shaft of Stepping Motor e f the regular torque is detected when rotating the Vertical Louver with hands Normal e Check the connecting condition of CN U D
35. r Drain Pump n some of the places natural drainage is not possi ble For such places drain pump is very useful It removes condensed water from the unit Time Delay Safety Function It delays restarting of the compressor by three min utes thereby preventing damage to the compressor Zero Standby Power Due to SMPS Switching Modulation Power Supply technology there is almost zero power consumption in the standby mode Child Lock Function It prevents the children or others from tampering the control buttons Unit can be controlled by the wireless remote controller This can be easily set by pressing timer key amp Min key simultaneously After child lock is set pressing any key will displaye CL on the LCD for 3 seconds and all the keys will be ineffective Self Diagnosis Function This function provides diagnosis of the unit An error code will be displayed on the LCD wired remote controller amp diagnosis can be done as per the code indication The same is also printed on key cover of the LCD wired remote controller 10 Ceiling Cassette Air Conditioner Air Velocity Distribution High Ceiling General Others LG AUTO SWING OPERATION SET TEMP FAN SPEED SUB FUNCTION Ze Se EI GHI AUTO Heater Preheat n 7 xt Deet Defrost al ic 610 Fiter Out door ET ime I Q Setno Time 01 03 05 O07 09 11 13 15 17
36. r re Be cautious when unpacking For installation always con install the unit by yourself and installing the product tact the dealer or an customer Authorized Service Center e There is risk of fire electric shock Sharp edges could cause injury here is risk of fire electric shock explosion or injury Be especially careful of the case explosion or injury edges and the fins on the con denser and evaporator Do not install the product ona Be sure the installation area Do not let the air conditioner defective installation stand does not deteriorate with age run for a long time when the humidity is very high and a door or a window is left open e It may cause injury accident or e f the base collapses the air condi Moisture may condense and wet or damage to the product tioner could fall with it causing damage furniture property damage product failure and personal injury B Operational Do not touch operate the Do not place a heater or other Do not let electric parts of the product with wet hands appliances near the power product get wet cable e There is risk of fire or electrical e There is risk of fire or electric e There is risk of fire failure of the shock shock product or electric shock Service Manual 5 Safety Presautions Do not store or use flammable gas or com If strange sounds or small or smoke comes bustibles near the product from product Tur
37. r when the desired time is obtained and to cancel the Timer operation 10 SLEEP MODE AUTO BUTTON 18 Used to set Sleep Mode Auto operation 14 11 AIR CIRCULATION BUTTON 16 Used to circulate the room air without cooling 12 ROOM TEMPERATURE CHECKING BUTTON Used to check the room temperature 13 PLASMA AIR CLEAN BUTTON Used to start or stop the plasma purification func Flip up door tion opened 14 HORIZONTAL AIRFLOW DIRECTION CONTROL BUTTON OPTIONAL Used to set the desired horizontal airflow direction 15 RESET BUTTON Used prior to resetting time 16 2nd F Button O1 o 3 Operation Mode Cooling Operation i Used prior to using modes printed in blue at the bot Auto Operation tom of buttons n 17 AUTO CLEAN OPTIONAL Used to set Auto Clean mode Healthy Dehumidification Operation 18 C F SWITCH BUTTON Used to switch temperature reading from Centigrade to Fahrenheit The wireless remote controller do not operate the swirl mode 12 Ceiling Cassette Air Conditioner 2 Wired LCD Remote Control AUTO SWING oe CEDERE FAN SPEED SUB FUNCTION sk A MN CO C S 858 D Time Function of Remote Control Room HI DATO Heater Preheat Li d CO d E BUD EET Defrost Humidity 1 LO SLo Filter Out door C ZONE 1234 DIOS Opern una NDS rena S 1 Operation display Displays the operati
38. rection always remove the paper template 1 Temporarily fix two decoration panel fixing screws hexagon M5 screw on the unit body Tighten by amount 10mm 0 39inch in length The fixing screws hexagon M5 screw are included the indoor unit box 2 Remove the air inlet grille from the decoration panel Remove the hook for the air inlet grille cord 3 Hook the decoration panel key hole C on the screws fixed in step above and slide the panel so that the screws reach the key hole edge 4 Retighten completely two temporarily fixed screws and other two screws Total 4 screws 5 Connect the louver motor connector and display connector 6 After tightening these screws install the air inlet grille including the air filter Air conditioner unit Piping side Louver motor Decoration panel fixing screws EIL Control box cover hexagon M5 screws Temporally fitting at 2 places Tightening about 10mm 0 39inch Decoration panel A louver motor and display Display SS en wire for Decoration panel fixing screws Hexagon M5 screw Ee E E Inlet Grille 999 ae CAUTION Install certainly the decoration Good example Bad example EE panel ME V Cool air leakage causes sweating oo Air Cool air leakage C gt Water drops fall E J B good A e Ceiling I board Decoration pa
39. rger 2 Check temperature and pressure of refrigeration cycle Suction pressure Temperature Compared with Compared with Cause of Trouble Description the normal value the normal value Normal Excessive amount of High pressure does not quickly refrigerant rise at the beginning of operation Insufficient amount of Current is low Higher refrigerant Leakage Clogging Notice 1 The suction pressure is usually 4 5 6 0 kg cm G at normal condition 2 The temperature can be measured by attaching the thermometer to the low pressure tubing and wrap it with putty 32 Ceiling Cassette Air Conditioner Troubleshooting Guide Electronic Parts Trou Trouble 1 The Product doesn t operate at all Does the Operating LED of indoor unit blink When Operation s ON Is the Connection between CN POWER of indoor unit and terminal block Is the Connection of cable between indoor and Outdoor unit right Is the voltage of CN POWER in outdoor PCB ASS Y about AC220 240V Check the main power Check the Fuse of outdoor PCB Ass y Check the connecting state of wires Check the Auto Addressing Work Confirm Auto Addresssing work method Replace the PCB Ass y The product s operation starts at three minutes after main power turning on Service Manual 33 Troubleshooting Guide Trouble 2 Product doesn t operate with the remote controller Turn on main power While the compressor has been stopped the compressor
40. rt Cap port H H port To outdoor unit UE wo Shaft position Service port Shaft position Shipping Closed Closed Closed Closed with valve cap with cap with valve cap with cap Air purging Open Open Closed Open 1 Installation counter clockwise push pin or with clockwise push pin or with vacuum pump vacuum pump Operation Open Closed Open Closed with valve cap with cap with valve cap with cap Pumping down Closed Closed Open Open Transfering clockwise with cap counter clockwise connected manifold gauge Evacuation Open Open Open Servicing connected connected manifold gauge manifold gauge Gas charging Open Closed Open 4 Servicing with cap with charging cylinder Pressure check Open Open Open ei Servicing connected connected manifold gauge manifold gauge Gas releasing Open Open Open Servicing connected connected manifold gauge manifold gauge 48 Ceiling Cassette Air Conditioner 1 Pumping down SN Liquid side J CLOSE da i E Purge the air e Procedure For pumping down firstly short the Low Pressure s w at the outside and then operate below proce dure 1 Confirm that both the gas side and liquid side valves are set to the open position Remove the valve stem caps and confirm that the valve stems are in the raised position Be sure to use a hexagonal wrench to operate the valve stems 2 Operate the unit for 10 to 15 minutes 3 St
41. s Eva out 63230 2 en The model name of Front Panel for this model is PT CDC1 Refer to 59 page Service Manual 53 Exploded View and Replacement Parts List Parts List LOCATION No 130411 DESCRIPTION BASE ASSEMBLY WELD INDOOR LCN240CP LC240CPI Part No 3041A10069A LCN340CP LC340CPI 130911 1 CABINET ASSEMBLY INDOOR 3091A10075E 130911 2 130911 3 CABINET ASSEMBLY INDOOR CABINET ASSEMBLY INDOOR 3091A10085C 3091A10077A 130911 4 CABINET ASSEMBLY INDOOR 3091A10075F 135500 1 152510 COVER HOSE ASSEMBLY DRAIN 3550A30273A 5251A10003A 158591 PUMP ASSEMBLY WATER 5859A10006G 159830 249951 FILTER ASSEMBLY AIR CLEANER CASE ASSEMBLY CONTROL INDOOR 4995A10224E 5983A10003D 4995A10224F 263230 1 THERMISTOR NTC 6323A30002A 263230 2 266090 THERMISTOR NTC HVPS DC DC 6323AQ3226W 6609A20009L 267110 1 REMOTE CONTROLLER ASSEMBLY 6711A20127E 267110 2 268714 REMOTE CONTROLLER ASSEMBLY PCB ASSEMBLY MAIN 6871A10366M 6711A20083Q 6871A10366N 330870 PAN ASSEMBLY DRAIN 3087A10035H 337000 346810 MESH METAL MOTOR ASSEMBLY DC INDOOR 3700A20036A 4681A20168D 349480 ORIFICE 4948A20039A 349600 352118 BRACKET MOTOR TUBE ASSEMBLY MENIFOLD INDOOR 5211A10600C 4960A20080A 5211A10600A 354211 EVAPORATOR ASSEMBLY FINAL
42. spaces indicated by arrows from the wall ceiling or other obstacles e The indoor unit must have sufficeient maintenance space 50 19 7 or more 98 4 Above 250 1 2 Outdoor Unit e f an awning is built over the unit to prevent direct sunlight or rain exposure make sure that heat radiation from the condenser is not restricted e Ensure that the space around the back is more than 30cm 11 8inch and sides is more than 30cm 11 8inch The front of the unit should have more than 70cm 27 6inch of space e Do not place animals and plants in the path of the warm air e Take the air conditioner weight into account and select a place where noise and vibration are minimum e Select a place so that the warm air and noise from the air conditioner do not disturb neighbors e Rooftop Installations If the outdoor unit is installed on a roof structure be sure to level the unit Ensure the roof structure and anchoring method are adequate for the unit location Consult local codes regarding rooftop mounting More than More than 30cm 1 1 8inch More than 50cm 19 7inch Service space Mare than NS More than n Je 30cm 11 8inch DA amp o0cm 19 7inch More than 50cm 19 7inch More than 50cm 19 7inch More than Tm More than 70cm 27 6inch 100cm 39 Ainch A 22 Ceiling Cassette Air Conditioner Installation 2 Settlement of outdoor unit e Anchor the outdoor unit with a bolt and n
43. t should be kept at a distance from the ground Do not dip it into water and fix it on the wall to avoid swinging in the wind In case of the Outdoor unit being installed Nal below position of the Indoor unit Pipings i 7 P Connecting e cable Power supply d P l i a 2 Tape the Pipings drain hose and Connecting Cable from bottom to top 3 Form the pipings gathered by taping along the exterior wall and fix it to the wall by saddle or equivalent Trap is required to prevent water from entering into electrical parts 26 Ceiling Cassette Air Conditioner Installation Seal a small opening around the pipings with gum type sealer In case of the Outdoor Unit being installed above position of the Indoor Unit 2 Tape the Pipings and Connecting cable from bot tom to top 3 Form the pipings gathered by taping along the exterior wall and make the trap prevent water from entering into the room 4 Fix the pipings onto the wall by saddle or equiva lent 7 Drain Pipe Work Drain Piping of Ceiling Cassette Upward Drain piping must have down slope 1 50 to 1 100 be sure not to Pipe clamp Se provide up and down slope to prevent reversal flow not allowed e During drain piping connection be careful not to exert extra force on the drain port on the indoor unit The outside diameter of the drain connection on the indoor unit is 32mm 1 26inch Main
44. tenance drain port Piping material Polyvinyl chloride pipe VP 25 and pipe fittings e Be sure to install heat insulation on the drain piping dmm a mospem Heat insulation material Polyethylene foam with Y thickness more than 8 mm 0 31inch kl B Install the drain raising pipes at a right angle to the Dinamo y indoor unit and no more than 300mm 11 81inch from Clamp metal attached Drain hose attached the unit e Connect the main drain pipe to the exterior and The air conditioner uses a drain pump to drain water leave it provisionally until the test comes to an end Use the following procedure to test the drain pump Feed water to the flexible drain hose and check the EES Feed water Flexible drain hose PIPING for leakage accessory Be sure to check the drain pump for normal operat Pond ing and noise when electrical wiring is complete _ eWhen the test is complete connect the flexible drain hose to the drain port on the indoor unit Drain Pump Glue the joint Drain hose connection Use the clip accessory Flexible drain hose Drain pan AN CAUTION MAX 700mm 27 6inch The supplied flexible drain hose should not be curved neither screwed The curved or screwed hose may cause a leakage of water Service Manual 27 Installation 8 Test running 1 PRECAUTIONS IN TEST RUN e The initial power supply must provide at least 90 of the rated
45. the main PCB Service Manual 41 Troubleshooting Guide Troubleshooting CI Display code Cause of error Check point amp Normal condition Power input AC 220V Outdoor Indoor 05 e The connector for transmission is disconnected he connecting wires are misconnected e Communication poorly e The GND1 2 is not connected at main GND e The communication line is shorted at GND e Transmission circuit of outdoor PCB is abnormal e Transmission circuit of indoor PCB is abnormal Communication Indoor Outdoor Check Point 1 Check the input power AC230V Outdoor Indoor unit 2 Check the communication wires are correctly connected Adjust the connection of wire Confirm the wire of Live Neutral 3 Check the resistance between communication line and GND Normal Over 2MQ 4 Check the connector for communication is correctly connected 5 Check the connection of GND1 GND2 and main GND 6 If one indoor unit is operated normally outdoor PCB is no problem Check the another indoor unit CHO5 is displayed at indoor unit CH53 is displayed at outdoor unit 42 Ceiling Cassette Air Conditioner Troubleshooting Guide Troubleshooting CH 24 C prod Cause of error Check point amp Normal condition 24 Press S W Open e Low High press e Check the connection of CN Press S W open e Check the components e Abnormal Input voltage e Check the power source Input v
46. unit cable No mm No AWG 4 2 1 14 4 2 1 14 sd 1 Capacities are based on the following conditions Cooling Indoor Temperature 26 7 C 80 F DB 19 4 C 67 F WB E DI UU Outdoor Temperature 35 C 95 F DB 23 9 C 75 F WB Piping Length Interconnecting Piping Length 7 5m 25ft Level Difference of Zero CFM CMM x 35 3 14 Ceiling Cassette Air Conditioner Specifications AT C243HLFO AT C343HLFO LCU240CP LC240CPO LCU340CP LC340CPO Rated Capacity Cooling kW 9 96 24 000 34 000 Heating kW Outdoor Unit e Co Rated Input Cooling kW 2 5 3 6 Heating kW Energy Label Testing combination Running current Cooling A 11 5 17 Heating A a Starting current Cooling Heating A 24 38 Power supply Phase Volts Hz 1 208 230 60 2 208 230 60 Power supply Cable outdoor No mm No AWG 3 2 1 14 3 3 3 12 Power and transmission cable No mm No AWG 4 2 1 14 4 2 1 14 Dimensions W H D mm inch 870 800 320 34 2 31 2 127 52 1900 1160 370 35 16 45 e 147 16 Net weight kg lbs 73 160 86 190 Gross weight kg lbs 78 172 93 205 Maximum number of connectable unit 1 1 constant Qty model 2 GK120KAA GJ151KAA GJ208KAA Motor Type Induction Induction Oil charge volume CC 700 1200 Oil type PVE PVE Refrigerant Charge at 7 5m 25ft g oz 2100 74 1 2500 88 2 Type R410A R410A Control E
47. ut 10mm 0 39inch tightly and horizontally on a concrete or rigid mount When installing on the wall roof or rooftop anchor Bolt the mounting base securely with a nail or wire assum ing the influence of wind and earthquake e In the case when the vibration of the unit is conveyed connection to the hose secure the unit with an anti vibration rub ber W i E SSES 3 Indoor Unit Installation Ceiling Hanging bolt Keep the length of the bolt W3 8 or M10 Dem from the bracket to 40mm 1 57inch Nut W3 8 or M10 Spring washer M10 150mm 5 91inch Flat washer for M10 accessory Ceiling board 7 QW C Y N Flat washer for M10 accessory Paper model Set screw of Nut for installation paper model 4 pieces W3 8 or M10 Open the ceiling board along the outer edge of the paper model Adjust the same height The following parts is option Drill the piping hole on the wall slightly tilted to D Hanging Bolt W 3 8 or M10 the outdoor side using a 70 2 76inch hole core Nut W 3 8 or M10 drill Spring Washer M10 Plate Washer M10 CAUTION e Tighten the nut and bolt to prevent unit falling Wall indoor pz Outdoor E n LO T O E oo N e l N Service Manual 23 Installation 4 Wiring Connection 1 All wiring must comply with LOCAL REGULATIONS 2 Select a power source that is capable of supplying the current as required by th
48. voltage Otherwise the air conditioner should not be operated CAUTION D For test run carry out the cooling operation first even during winter season Carry out the test run more than 5 minutes without stopping Test run will be cancelled 18 minutes later automatically e The test run is started by pressing the room temperature checking button and down timer button for 3 sec onds at the same time e To cancel the test run press any button CHECK THE FOLLOWING ITEMS WHEN INSTALLATION IS COMPLETE e After completing work be sure to measure and record trial run properties and store measured data etc e Measuring items are room temperature outside temperature suction temperature blow out temperature wind velocity wind volume voltage current presence of abnormal vibration and noise operating pressure piping temperature compressive pressure As to the structure and appearance check following items L1 Is the circulation of air adequate L1 Is the remote controller switch operated L1 Is the draining smooth Ll Is there any faulty wiring L1 Is the heat insulation complete L1 Are not terminal screws loosened refrigerant and drain piping L1 Is there any leakage of refrigerant M4 118N cm 12kgf cm 10 4lbf in M5 196N cm 20kgf cm 17 4lbf in M6 245N cm 25kgf cm 21 7Ibf in M8 588N cm 60kgf cm 52 1lbf in 28 Ceiling Cassette Air Conditioner Installation 2 Connection of power supply 1
49. website http www lgservice com I G e mail http www lgeservice com techsup html LG Ceiling Cassette Aur Conditioner SERVICE MANUAL MODEL LCN240CP LCU240CP LC240CPI LC240CPO LCN340CP LCU340CP LC340CPI LC340CPO CAUTION e BEFORE SERVICING THE UNIT Dens THE SAFETY PRECAUTIONS IN THIS MANUA ONLY FOR AUTHORIZED EM PERSONNEL TABLE OF CONTENTS Table of contents Page Beie EN DIS cane eee eee een ee ee eee ee ee DEM EM ee ee E IUE 3 2 Safety F Fe CAN EE 4 3 Feature amp BOIS essen eenden nenten meente 8 SNB OT FUNCION NETT 11 D Funcion OKE MOE e 1 e PN UU 12 BPS Tei MCA rte 14 7 Dimensional Drawings E 16 sm WINA CUE A E E E E 19 9 Refrigerant Cycle Diagrams ERE Em 21 TOMS O e E E A mate 22 Tt Trouble Shooting UN RN A mm 32 12 AE 48 13 Electroni Control E 52 14 Exploded View and Replacement Parts Iert 53 2 Ceiling Cassette Air Conditioner P Models List 1 Model line up 1 1 Indoor units Category Type Chassis 7 03 24 Model names Capacity kW kBtu h Models List 9 96 34 Ceiling cassette AT C243HLFO AT C343HLFO 1 2 Outdoor units Cooling only No of connectable indoor units Total capacity index of connectable indoor units Power supply Chassis NZA Local model name kBtu h AT C243HLFO 7 03 AT C343HLFO 9 96 34 10 208 230V 60Hz Local Model 1 Local Model 2 Factory Indo
50. y Wired Remote Controller SS Single Contro e Using the supplied Wired Remote Controller wire Group Control 1 Group Control 2 them like above Remote e Move S W GR to Group Control 1 position Controller PCB e Check the line color of the wire CAUTION Be careful not to exchange the color of wires The maximum length of connecting wire should be below 200m 656ft 25Q on connecting each units Use a wire more than 0 5mm Service Manual 31 Troubleshooting Guide E Troubleshooting Guide Cycle Troubleshoc Trouble analysis 1 Check temperature difference between intake and discharge air and operating current Temp difference approx O C O F All amount of refrigerant leaked out Current less than 80 of Check refrigeration cycle rated current Temp Difference Operating Current Temp difference approx 8 C 14 4 F Refrigerant leakage Current less than 80 of Clog of refrigeration cycle rated current Defective compressor Temp difference less than 8 C 14 4 F Current near the rated cur rent Excessive amount of refrigerant Temp difference over 8 C 14 4 F Normal Notice Temperature difference between intake and discharge air depends on room air humidity When the room air humidity is relatively higher temperature difference is smaller When the room air humidity is relatively lower temperature difference is la

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